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3 years ago

Find the domain of the function f(x) = 7x2 + 8x - 15.

Mathematics

1 answer:

amm18123 years ago

5 0

Answer:

Domain is all real numbers or (negative infinity, positive infinity)

Step-by-step explanation:

Domain is all values of x (inputs) that will work with the function. Since a parabola has no limits for x, and all numbers work for x, then the domain can be any number. That leaves us with All Real Numbers as our answer.

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I really need help on these few questions. I real deal don't understand them so anyone who does can you please help me?

belka [17]

This looks really hard :(

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3 years ago

Two brothers have ages that are consecutive odd integers. The product of their ages is 38 less than the older brother's age squa

Lemur [1.5K]

answer = the elder bother is 17 and the younger one is 15

constructive odd integers= 15 and 17

17×15= 255

255+38 = 293

Square root of 293 = 17

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3 years ago

Find the perimeter of the polygon. a. 25 cm b. 20 cm C. 30 cm d. 28 cm

ddd [48]

The answer is (a. 25cm)

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3 years ago

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sammy [17]

Answer: About (-2.414, 0) and (0.414, 0)

Step-by-step explanation:

Let us graph the equation given and see what the x-intercepts are. These are points where the line intercepts the x-axis. See attached.

This means our x-intercepts are at about (-2.414, 0) and (0.414, 0).

These are also equal to $-1-\sqrt{2}$ and $-1+\sqrt{2}$

8 0

1 year ago

Read 2 more answers

A spherical balloon has a 34-in. diameter when it is fully inflated. Half of the air is let out of the balloon. Assume that the

jeka57 [31]

Answer:

a. 20,579.52 cubic inches

b.10,289.76 cubic inches.

c. 13.49 inches

Step-by-step explanation:

Hi, to answer this question we have to calculate the volume of a sphere:

Volume of a sphere: 4/3 π r³

Since diameter (d) = 2 radius (r)

Replacing with the value given:

34 =2r

34/2=r

r= 17 in

Back with the volume formula:

V = 4/3 π r³

V =4/3 π (17)³

V = 20,579.52 cubic inches

The volume of the half-inflated balloon is equal to the volume of the sphere divided by 2.

20,579.52/2 = 10,289.76 cubic inches.

To find the radius of the half-inflated balloon we have to apply again the volume formula and substitute v=10,289.76

10,289.76= 4/3 π r³

Solving for r

10,289.76/ (4/3 π)= r³

2,456.5 = r³

∛2,456.5 = r

r = 13.49 inches

7 0

3 years ago